Apparatus for loading centrifugal extractors



Dec. 29, 1936.

H. KRANTZ ET AL APPARATUS FOR LOADING GENTRIFUGAL EXTRACTORS Filed Sept. 21, 1931 2 She'ets-Sheet 1 l Dec. 29, 1936. H. KRANTZ El AL APPARATUS FOR LOADING CENTRIFUGAL EXTRACTORS 2 Shets-Sheet 2 Filed Sept. 21, 1931 Patented Dec. 29, 1936 UNITED STATES. PATENT OFFICE APPARATUS FOR LOADING CENTRIFUGAL EXTRACTQRS Hubert Krantz and Heinrich Buysch, Aachen, Germany, assignors to the firm of H. Krantz, Aachen, Germany Application September 21, 1931, Serial No. 564,168 6 Claims. (01. 210-'76) Thisinventlon relates to centrifugal extractors, tied or untied for closing and opening the bag, such as extractors for laundries, and has more respectively. particularly reference to extractors of the kind For withdrawing the rim and bag from the exdescribed in our application for Letters Patent tractor and replacing them therein, there is used Serial No. 516,471, with which the rotary basket a suitable conveying device such as a crane 6 has a detachable top rim .to which is attached a with suspension ropes I which are adapted to be permeable bag for receiving and holding the detachably connected with the rim, as shown in charge, the bag being adapted to be removed and Fig. 2. As the crane may be of a conventional replaced with the rim relatively to the basket type, only its working pulley and suspension hook by means of a suitable conveying and lifting deare shown in the drawings.

vice, to which the rim can be detachably con- To allow of'the bag 3 to be easily and quickly nected. filled with the material to be treated at any The invention has for its object to provide a desired place outside the extractor, we provide simple apparatus which allows of an easy and a frame 8 adapted to have the rim 4 deposited on quick loading of extractors of the kind stated, its-upper edge and the bag lowered into its in- 15 this apparatus essentially consisting of a portterior. This frame is preferably carried by a able and rotatable frame separate from the extruck 9 having floor wheels l0 and a central pivot tractor on which the detachable basket rim with H, about which the frame 8 can be turned; the the bag after having been withdrawn from the frame has at its bottom a plate [2 with a central extractor and emptied, can be freely supported bore which is engaged by the pivot ll. Antifricin such a mannerthat the rim can be detached tion means l3 between the plate l2 and the truck from the lifting device and the bag filled with 9 facilitate the turning of the frame on the the material to be extracted at any suitable place truck. The frame 8 can easily be moved about of the working room, for instance directly adjain the working room, such as between extraccent to a washing machine the wet goods of tors and washing machines in laundries, and 25 which are to be treated in the extractor. when being loaded can be turned about its cen- Another object of the invention is to give the tral vertical axis to allow proper distribution of said rim-and-bag supporting frame substantially the material in the bag 3. the same shape as the extractor basket, so that The frame 8 has the contour and dimensions the bag when lowered into the frame and filled of the extractor basket 2. Thus, when the bag 30 with material, adopts the shape suitable for its 3 is lowered into and the rim 4 deposited on the insertion into the extractor basket, and to proframe 8, the bag will adopt the same shape vide means for maintaining this shape of the and position it is forced to take in the extracfilled bag while being carried to and lowered tor. Many extractors have on their bottom a. into the extractor basket. hollow inwardly extending conical projection, 35

In order to allow of the invention to be more such as shown at Min Fig. 3, this hollow cone clearly understood, it will now be described with serving to accommodate the bearings of the basreference to the accompanying drawings which ket spindle. When the apparatus according to illustrate a preferred embodiment of our apthe invention is designed to be used for loading paratus. Fig. 1 is a sectional view of the portextractors of this kind, the frame 8 is provided 40 able rim-and-bag supporting frame, the bag bewith a similar cone-shaped projection [5. When ing filled with material: Fig. 2 shows the rim the bag 3 is lowered into the frame, the central and filled bag suspended from a conveying deportion of the closed lower end of the bag, i. e. vice ready for being lowered into an extractor, the tied cord 5, lays on the summit of the cone and Fig, 3 is a sectional view of an empty extracl5 and the walls of the bag fit to the inner sur- 45 tor ready to receive the rim and bag. faces of the frame. In order to hold the filled Referring to the drawings in detail, I is the bag in the shape it assumes in the frame 8 while extractor and 2 the rotary basket thereof. 3 is it is withdrawn from this frame, carried over the bag which is made of network or of a suitthe extractor and lowered into the latter, the

able permeable fabric. 4 is the rim of the bascrane 6 is provided with a rope l6 which, when ket which is detachable from the basket shell. the bag has been filled in the frame 8, is at- The bag 3 is attached by its upper end to the tached by its lower end to the cord 5 and holds underside of the rim 4, while its lower end is same in its elevated position relatively to the provided with a number of eyelets through which bag, as shown in Fig. 2. It is attained hereby i passed a cord 5, which can be drawn tight and that the filled bag can be introduced smoothly as follows: Assuming the apparatus to be used -in a laundry, the portable frame 8 is positioned quite close to a washing machine and an empty bag 3 with therim 4 received and held by the frame 8 as shown in Fig. 3, the suspension ropes of the crane being detached from the rim and bag. The wet material of the washing machine is then filled directly into the bag 3. During the filling, the frame 8 may be turned as desired to permit uniform distribution of the material in the bag. When filled, the frame 8 is moved to the extractor, whereupon the ropes 1, it of the crane 6 are attached to the rim 4 and cord- 5,

respectively. The rim with the filled bag is then withdrawn from the frame 8, brought over the extractor and then lowered into the basket, the rim 4 seating on the upper margin of the basket to which it ,is connected through suitable looking means. The ropes of the crane 6 are de-,

tached from the rim and bag and the extractor is started. In the meantime, the empty frame 8 is moved back to the same or another washing machine to receive another charge.

of course, instead of moving the frame from the washing machine with the full bag to the extractor, the frame may also be left near the washing machine and the rim with the filled bag carried to the extractor by the traveling crane 8. At the end of the extracting operation, the extractor is stopped; the ropes 1 are attached ,to the rim 4, and the rim with the bag is withdrawn from the extractor and carried to the place where it is desired to empty the bag. This is done by untying the cord 5 which, in the removal of the bag from the extractor, has not been attached to the rope It. The bag when empty is clbsed by the cord 5 and then lowered again into the frame 8 or another similar frame to receive a fresh charge of material.

While the frame 8 is herein shown as consisting of a cylindrical casing, it might also be made of a number of bars and brackets sufllcient to support the rim 4- in a proper position to allow of an easy filling of the bag attached to the rim.

Suitable locking means, not shown, may be used for preventing accidental turning of the frame 8 relative to the truck 8 during the transport from one place to another.

Having thus described our invention, what we claim as new and desire to secure by Letters-Patent, is:-

1. An apparatus for loading centrifugal extractors having a rotary basket with a removable top rim, comprising in combination a bag for receiving and holding the charge, attached to the removable basket rim, conveying and lifting means for the rim and bag, a frame separate from the extractor adapted to support the rim and bag in a position ready .for being filled with the material to be extracted. and means carrying the said frame so as to allow it to be turned about its vertical central axis.

2. An apparatus for loading centrifugal extractors havinga rotary basket with a removable top rim, comprising in combination a bag for receiving and holding the charge attached by its upper end to the basket rim and provided at its lower end with means for closing and opening the same, a portable rotatable frame of substantially the same shape as the extractor basket adapted to receive and support the rim and bag in a position ready to be filled with the material to be extracted, a central cone-shaped projection extending from the bottom of the supporting frame inwardly of the sameand adapted to have the central portion of the closed bottom of the bag seated on its summit when the bag is lowered into the supporting frame, and a conveying and lifting device for the rim and bag including suspension ropes adapted to be detachably fastened to the rim and a rope adapted to be detachably fastened to the bottom closing,

tour as the extractor basket, a material-receiving bag removably placed in said frame and completely shaped and sized by the frame to conform more or less exactly to the shape and size of the interior of the extractor basket, the bag while exteriorly confined by the frame being in the exact size and shape assumed by the bag when,

in the extractor basket and being designed for loading with particular regard to quantity and load distribution, whereby the amount and distribution of the load in the bag'while the bag is held in the frame will determine the distribution of the load, when placed in the basket, and

elevating means connected to the bag for removing the bag from the frame and transferring it to the basket, said elevating means being connected to the bag to maintain the frame-defining form of the bagand thereby the initial dies tribution of the load during transfer of the bag and its contents from the frame to the basket, whereby during operation of the extractor on one load a subsequent load may be prepared therefor in exact accordance with load distribution desired when'the loadxis within the basket to thereby materially reduce periods of inactivity of the extractor.

4. A means for loading centrifugal extractors, including a frame conforming in size and shape to that of the extractor basket, a bag removably supported in the frame and shaped in the frame to conform to the size and shape of the extractor basket to permit loading the bag while in the frame in accordance with the desired relation of the load when the bag is in the basket, and means for transferring the loaded bag from the frame to the basket, said means being connected to the edge of the bag and to the central portion of the bottom thereof and arranged to maintain the form of the loaded bag when elevated from the frame in substantially exact accordance with the form of the bag when in the frame, whereby when the loaded bag is transferred to the basket the relation of the load to the bag when the latter is in the frame will be maintained by the load in the bag when the latter is in the basket.

5. A method of providing a load of predetermined bulk and arrangement for the basket of a centrifugal extractor, with such load arranged a acteristics of the extractor basket designed to receive the load, loading the container while confined as to size and shape beyond the extractor basket to insure a proper quantity and load distribution for the particular extractor basket, and transferring the loaded container from the point of loading to and within the extractor basket while maintaining during such transference the predetermined size and shape of the loaded container, whereby the load within the container when in the basket will have the same load characteristics as the load in the container outside the basket.

6. A method of providing a load preformed as to size, shape and load distribution to be placed within the basket of a centrifugal extractor in substantially exact preformed condition, consisting in providing a flexible load container adapted when in the basket to assume a size and shape conforming to that of the basket, preforming the flexible container wholly beyond the basket into a size and shape substantially conforming to that of the basket, loading the container while in such preformed condition outside of the basket, with the load in the preformed container arranged and distributed to avoid centrigual stresses when the load is within the basket, and transferring the preformed container with the load into the basket of the extractor while maintaining the preformed condition of the container and the load distribution of the load, whereby, while the extractor is operating on one load, a second load conforming in substantially exact correspondence to the size and shape of the basket and having a load distribution to. avoid centrifugal stresses when in the basket may be made ready.

HUBERT KRANTZ. HEINRICH BU'YSCH. 

